Acute effect of passive one-legged intermittent static stretching on regional blood flow in young men

Yamato, Yosuke; Higaki, Yuya; Fujie, Shumpei; Hasegawa, Natsuki; Horii, Naoki; Aoyama, Hideyasu; Yamashina, Yoshihiro; Ogoh, Shigehiko; Iemitsu, Motoyuki

doi:10.1007/s00421-020-04524-0

Cited by 15 publications

(20 citation statements)

References 27 publications

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“…However, in this study, the blood flow in the posterior tibial arteries increased for 10 s after the 30-s passive calf intermittent static stretching, but significant changes in HR and CO were not observed during both the stretching and relaxation periods. This result is consistent with our previous study [ 11 ], which reported no change in HR during the stretching and relaxation periods in the same 30-s passive calf intermittent static stretching. Moreover, this study showed that parasympathetic activity, estimated by LF/HF, did not change before and after the acute passive calf intermittent static stretching (30 s × 6 sets) which used different relaxation periods, and it concomitantly did not alter HR, SBP, and DBP.…”

Section: Discussionsupporting

confidence: 94%

“…The diameter and mean blood velocity were used to calculate the posterior tibial artery blood flow and shear rate. Blood flow was calculated as: mean blood velocity × π (vessel diameter/2) 2 × 60 [ 11 , 12 , 15 ], where blood flow was measured in milliliters per minute (mL/min). Shear rate (per second), a useful estimator of shear stress that does not account for blood viscosity, was defined as: [4 × mean blood velocity]/vessel diameter [ 11 , 12 , 15 ].…”

Section: Methodsmentioning

confidence: 99%

“…Blood flow was calculated as: mean blood velocity × π (vessel diameter/2) 2 × 60 [ 11 , 12 , 15 ], where blood flow was measured in milliliters per minute (mL/min). Shear rate (per second), a useful estimator of shear stress that does not account for blood viscosity, was defined as: [4 × mean blood velocity]/vessel diameter [ 11 , 12 , 15 ]. The aortic diameter and blood velocity were measured using the LOGIQ S7 ultrasound system (GE Healthcare, Chicago, USA).…”

Section: Methodsmentioning

confidence: 99%

“…The participants experienced a single session of passive one-legged calf static stretching, as previously described [ 11 ]. In this study, stretching was passively held for 30 s at the end range (point of minimal discomfort), followed by 5-, 10-, 20-, or 60-s relaxation periods for six repetitions.…”

Section: Methodsmentioning

confidence: 99%

“…Venturelli et al [ 10 ] observed that acute passive quadriceps intermittent stretching, composed of 15-s relaxation after 45-s static stretching, increased blood flow in the femoral artery of the stretched leg, indicating the possibility that stretching may increase the shear rate and induce vasodilation via endothelial function. Our recent study demonstrated that acute passive one-legged calf intermittent stretching (30-s × 6 sets) significantly increased shear rate as well as blood flow in the posterior tibial artery of the stretched leg during a 10-s relaxation period after stretching, when compared to that before stretching [ 11 ]. These findings suggest that intermittent calf stretching increases shear rate during the relaxation period and consequently decreases arterial stiffness.…”

Section: Introductionmentioning

confidence: 99%

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Acute effects of the different relaxation periods during passive intermittent static stretching on arterial stiffness

et al. 2021

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To clarify whether the relaxation period during stretching affects the degree of elevated shear rate and the degree of reduction of arterial stiffness, we examined relaxation duration to build an adequate stretching protocol. In Experiment 1, the changes in cardiac output, the shear rate in the posterior tibial artery, and blood volume in the calf muscle were measured during recovery (0–60 s) from a single bout of one-legged passive calf stretching in 12 healthy young men. In Experiment 2, the effects of different relaxation periods (5-, 10-, 20-, and 60-s) of passive one-legged intermittent calf stretching (30-s × 6 sets) on the femoral-ankle pulse wave velocity (faPWV) as an index of peripheral arterial stiffness were identified in 17 healthy young men. As a result, the stretched leg’s shear rate significantly increased from 0 to 10th s after stretching. The muscle blood volume in the stretched leg significantly reduced during stretching, and then significantly increased during the recovery period after stretching; however, cardiac output remained unchanged during stretching and recovery. Additionally, the reduction in faPWV from the pre-stretching value in the stretched leg was significantly larger in the protocol with 10-s and 20-s relaxation periods than that in the non-stretched leg, but this did not differ in the 5-s and 60-s relaxation periods. These findings suggest that the relaxation periods of intermittent static stretching that cause a high transient increase in shear rate (via reperfusion after microvascular compression by the stretched calf muscles) are effective to reduce arterial stiffness.

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Section: Discussionsupporting

confidence: 94%